import polars as pl
import os
customer_data = pl.read_csv(os.path.join('data', 'customer_data.csv'))
customer_data.shape
customer_data.columns
customer_data.filter(pl.col('college_degree') == 'Yes')
customer_data.filter(pl.col('region') != 'West')
customer_data.filter(pl.col('gender') != 'Female', pl.col('income') > 70000)
customer_data.slice(0, 5)
customer_data.sort(pl.col('birth_year'))
customer_data.sort(pl.col('birth_year'), descending = True)